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authorGhanan Gowripalan <ghanan@google.com>2021-01-13 16:02:26 -0800
committergVisor bot <gvisor-bot@google.com>2021-01-13 16:04:33 -0800
commit25b5ec7135a6de80674ac1ad4d2289c29e156f42 (patch)
tree5939fd3fd2e4afb2de9c4062cfd9066c544ab46e /test/runner
parent1efe0ebc5973ec8a06b881c087dae2183898504b (diff)
Do not resolve remote link address at transport layer
Link address resolution is performed at the link layer (if required) so we can defer it from the transport layer. When link resolution is required, packets will be queued and sent once link resolution completes. If link resolution fails, the transport layer will receive a control message indicating that the stack failed to route the packet. tcpip.Endpoint.Write no longer returns a channel now that writes do not wait for link resolution at the transport layer. tcpip.ErrNoLinkAddress is no longer used so it is removed. Removed calls to stack.Route.ResolveWith from the transport layer so that link resolution is performed when a route is created in response to an incoming packet (e.g. to complete TCP handshakes or send a RST). Tests: - integration_test.TestForwarding - integration_test.TestTCPLinkResolutionFailure Fixes #4458 RELNOTES: n/a PiperOrigin-RevId: 351684158
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